EP0319518B1 - Oil filter for the purification of lubricating oil - Google Patents

Oil filter for the purification of lubricating oil Download PDF

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Publication number
EP0319518B1
EP0319518B1 EP89100858A EP89100858A EP0319518B1 EP 0319518 B1 EP0319518 B1 EP 0319518B1 EP 89100858 A EP89100858 A EP 89100858A EP 89100858 A EP89100858 A EP 89100858A EP 0319518 B1 EP0319518 B1 EP 0319518B1
Authority
EP
European Patent Office
Prior art keywords
oil
filter
filter cartridge
cover
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP89100858A
Other languages
German (de)
French (fr)
Other versions
EP0319518A3 (en
EP0319518A2 (en
Inventor
Dieter Baumann
Norbert Prinz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ing Walter Hengst GmbH and Co KG
Original Assignee
Ing Walter Hengst GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Ing Walter Hengst GmbH and Co KG filed Critical Ing Walter Hengst GmbH and Co KG
Publication of EP0319518A2 publication Critical patent/EP0319518A2/en
Publication of EP0319518A3 publication Critical patent/EP0319518A3/en
Application granted granted Critical
Publication of EP0319518B1 publication Critical patent/EP0319518B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • F01M2001/105—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements
    • F01M2001/1064—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements comprising drains for oil to the carter, e.g. to recover spilled oil during change of filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/17—Twist-on
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/794—With means for separating solid material from the fluid
    • Y10T137/8085—Hollow strainer, fluid inlet and outlet perpendicular to each other

Definitions

  • the invention relates to an oil filter for cleaning lubricating oil, especially for internal combustion engines of motor vehicles, according to the preamble of patent claim 1.
  • Such an oil filter is known from DE-A-3 538 589, the known oil filter also having a drainage channel which is closed when the oil filter cartridge is attached and opened when the oil filter cartridge is removed in order to allow the residual oil to drain off in the filter housing.
  • an embodiment of the known oil filter is characterized in that the oil filter cartridge is latched to an upper housing cover.
  • the design is such that the holder of the oil filter cartridge can be snapped on at the end on a longitudinal projection of the housing cover, a thickening and a narrowing preventing unwanted loosening and basically allowing these parts to be separated so that the housing cover can be used multiple times.
  • An oil filter according to DE-C-3 543 437 is also known.
  • a main housing part to be covered with a removable bell-shaped housing cover which is connected to the main housing part by means of a central screw, greater stresses in the plastic housing cover are to be avoided.
  • the screw is provided with a stop which has the effect that the screw stroke is limited when the screw is tightened.
  • a radial seal is provided for mutual sealing of the main housing part and the housing cover.
  • a metal support ring rests on its inner circumference.
  • An embodiment of this oil filter provides that at the closed end of the housing cover inside for holding the filter insert axially inwardly projecting, resilient ribs connected to the housing cover and provided with recesses for clamping reception of the filter insert are provided.
  • an oil filter of the type mentioned which is characterized in that the screw cap and the filter cartridge are locked together to enable transmission of axial forces from both directions to the filter cartridge, wherein the screw cap has on its inside a plurality of spring tongues with locking projections arranged on a circle and projecting into the filter interior and the filter cartridge has at its end on the cover side a circular, matching locking recess that fits the locking projections, the spring tongues projecting to the bottom of the locking recess.
  • the surprising effect of the invention is that when changing the filter cartridge, the operator only has to grasp the lid with the filter cartridge fastened to it with one hand, the filter cartridge is supported diagonally with the free end on a base and the filter cartridge is pressed by hand detaches from the grid, whereby the filter cartridge is not touched, and whereupon the filter cartridge falls off.
  • the oil filter 1 essentially consists of a filter housing 2 with a base 20, an exchangeable oil filter cartridge 6 inserted into the housing 2 and a screw cap 7 closing the housing on the top side.
  • the longitudinal axis of the filter housing 2 runs obliquely upwards, so that there is an approximately upright position of the filter housing 2.
  • the base 20 of the filter housing 2 is angled with respect to the longitudinal axis of the housing 2 and ends in a substantially vertically running flange surface 20 ', which serves to connect the oil filter 1 to an internal combustion engine (not shown) of a motor vehicle.
  • the base 20 serves, as indicated by flow arrows, for the supply and discharge of oil.
  • Dirty oil passes through an oil inlet 21 in the rear, upper part of the base 20 into an inlet space 23 surrounding the filter cartridge 6 and is distributed there over the circumference of the cartridge 6. After flowing through the filter cartridge 6, more precisely its filter material body 60, this now collects cleaned oil in the inner area 24 of the filter 1 and flows from there - according to the flow arrows shown - through a central oil outlet 22 and the base 20 again.
  • the inlet space 23 and the inner region 24 of the oil filter 1 are separated from one another by a sealing ring 62, preferably made of rubber, on the lower end 64 of the filter cartridge 6 by the cover 7 on the upper end 63 of the cartridge 6.
  • a drainage channel 25 which serves that in the housing 2 of the oil filter Derive any oil present when replacing the filter cartridge 6.
  • the discharge channel 25 is blocked.
  • the filter cartridge 6 and the screw cap 7 are detachably connected to one another in the oil filter 1.
  • the screw cap 7 has a plurality of spring tongues 71 and 71 'on its inside 70, two of which are visible.
  • the spring tongues 71 and 71 ' are arranged on a circle concentric to the longitudinal axis of the filter housing 2 and project from the inside of the cover 70 into the interior of the filter housing 2.
  • the spring tongues 71 and 71' have outwardly projecting latching projections 72 and 72 ', the filter cartridge 6 inserted into the housing 2 engage in a matching, waisted locking recess 65 in the upper end face 63 of the filter cartridge 6.
  • the screw cap 7 is connected to the filter housing 2 in the exemplary embodiment of the oil filter 1 shown here with the interposition of a sealing ring 73 by screwing.

Description

Die Erfindung betrifft einen Ölfilter für die Reinigung von Schmieröl, insbesondere für Verbrennungsmotoren von Kraftfahrzeugen, nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an oil filter for cleaning lubricating oil, especially for internal combustion engines of motor vehicles, according to the preamble of patent claim 1.

Ein derartiger Ölfilter ist aus der DE-A-3 538 589 bekannt, wobei der bekannte Ölfilter auch einen Ableitungskanal aufweist, der bei angesetzer Ölfilterpatrone geschlossen und bei herausgenommener Ölfilterpatrone geöffnet ist, um einen Abfluß des Restöls im Filtergehäuse zu ermöglichen.Such an oil filter is known from DE-A-3 538 589, the known oil filter also having a drainage channel which is closed when the oil filter cartridge is attached and opened when the oil filter cartridge is removed in order to allow the residual oil to drain off in the filter housing.

Weiter ist eine Ausgestaltung des bekannten Ölfilters dadurch gekennzeichnet, daß die Ölfilterpatrone an einem oberseitigen Gehäusedeckel rastend angeklemmt ist. Die Ausbildung ist dergestalt, daß der Halter der Ölfilterpatrone endseitig auf einem longitudinalen Vorsprung des Gehäusedeckels rastend aufgeschnappt werden kann, wobei eine Verdickung und eine Verengung ein ungewolltes Lösen verhindern und grundsätzlich eine Trennung dieser Teile ermöglichen, damit der Gehäusedeckel mehrfach verwendet werden kann.Furthermore, an embodiment of the known oil filter is characterized in that the oil filter cartridge is latched to an upper housing cover. The design is such that the holder of the oil filter cartridge can be snapped on at the end on a longitudinal projection of the housing cover, a thickening and a narrowing preventing unwanted loosening and basically allowing these parts to be separated so that the housing cover can be used multiple times.

Wenn auch der bekannte Ölfilter sich besonders bei der Abdichtung des Ableitungskanals als vorteilhaft erwiesen hat und auch ein Fortschritt gegenüber früheren Ölfiltern dadurch erreicht wird, daß die Ölfilterpatrone beim Patronenwechsel vom Deckel gelöst wird, so daß der Deckel mehrfach verwendbar ist, so wird doch als Nachteil empfunden, daß das Lösen der Patrone vom Deckel durch Ergreifen beider Teile mit den Händen erfolgen muß, wobei erfahrungsgemäß die ausführende Person sich mit Altöl beschmutzt.Even if the known oil filter has proven to be particularly advantageous when sealing the discharge channel and also an advance over previous oil filters is achieved in that the oil filter cartridge is removed from the cover when the cartridge is changed, so that the cover can be used several times, it becomes a disadvantage felt that the release of the cartridge from the lid must be done by grasping both parts with your hands, and experience has shown that the person doing the work gets soiled with waste oil.

Aus diesem Grunde ist es vorgekommen, daß der vorgeschriebene Patronenwechsel nicht ausgeführt wurde, weil die schmutzige Arbeit gescheut wurde.For this reason it has happened that the prescribed cartridge change was not carried out because the dirty work was avoided.

Es ist auch ein Ölfilter nach der DE-C-3 543 437 bekannt. Bei diesem Schmierölfilter für Verbrennungsmotoren mit einem auswechselbaren Filtereinsatz, einem abzudeckenden Gehäusehauptteil mit einem abnehmbaren glockenförmigen Gehäusedeckel, der über eine Mittelschraube mit dem Gehäusehauptteil verbunden ist, sollen größere Spannungen in dem Gehäusedeckel aus Kunststoff vermieden werden. Dies wird dadurch erreicht, daß die Schraube mit einem Anschlag versehen wird, der bewirkt, daß beim Festziehen der Schraube der Schraubenhub begrenzt wird. Zum gegenseitigen Abdichten von Gehäusehauptteil und Gehäusedeckel ist eine Radialdichtung vorgesehen. Um ein Einfallen des Gehäusedeckels an seinem offenen Ende zu verhindern, liegt an dessen inneren Umfang ein Stützring aus Metall an.An oil filter according to DE-C-3 543 437 is also known. With this lubricating oil filter for internal combustion engines with an interchangeable filter insert, a main housing part to be covered with a removable bell-shaped housing cover, which is connected to the main housing part by means of a central screw, greater stresses in the plastic housing cover are to be avoided. This is achieved in that the screw is provided with a stop which has the effect that the screw stroke is limited when the screw is tightened. A radial seal is provided for mutual sealing of the main housing part and the housing cover. In order to prevent the housing cover from collapsing at its open end, a metal support ring rests on its inner circumference.

Eine Ausgestaltung dieses Ölfilters sieht vor, daß am geschlossenen Ende des Gehäusedeckels innen zur Halterung des Filtereinsatzes axial nach innen ragende, federnde an den Gehäusedeckel angebundene, mit Ausnehmungen zur klemmenden Aufnahme des Filtereinsatzes versehene Rippen vorgesehen sind.An embodiment of this oil filter provides that at the closed end of the housing cover inside for holding the filter insert axially inwardly projecting, resilient ribs connected to the housing cover and provided with recesses for clamping reception of the filter insert are provided.

Der Nachteil dieses Ölfilters liegt jedoch darin, daß die Filterpatrone tief in dem glockenförmigen Deckel eingebaut ist, so daß ein Herausnehmen beim Patronenwechsel sehr schwierig und nur unter Verwendung geeigneter Werkzeuge möglich ist, so daß die Gefahr der Ölverschmutzung noch größer ist als bei dem erstbeschriebenen Ölfilter.The disadvantage of this oil filter is, however, that the filter cartridge is built deep into the bell-shaped cover, so that it is very difficult to remove when changing the cartridge and only possible with the use of suitable tools, so that the risk of oil contamination is even greater than with the oil filter described first .

Es stellt sich daher die Aufgabe, einen Ölfilter der eingangs genannten Art zu schaffen, der die aufgeführten Nachteile vermeidet und der insbesondere kostengünstiger herstellbar und benutzbar ist.It is therefore the task of creating an oil filter of the type mentioned that the listed Avoids disadvantages and which is particularly inexpensive to manufacture and use.

Die Lösung dieser Aufgabe gelingt erfindungsgemäß durch einen Ölfilter der eingangs genannten Art, welcher dadurch gekennzeichnet ist, daß
der Schraubdeckel und die Filterpatrone eine Übertragung von axialen Kräften von beiden Richtungen auf die Filterpatrone ermöglichend miteinander verrastet sind, wobei
der Schraubdeckel an seiner Innenseite mehrere auf einem Kreis angeordnete, in das Filterinnere vorragende Federzungen mit Rastvorsprüngen aufweist und
die Filterpatrone an ihrem deckelseitigen Ende eine kreisförmige, zu den Rastvorsprüngen passende, taillierte Rastausnehmung besitzt, wobei die Federzungen bis zum Boden der Rastausnehmung ragen.This object is achieved according to the invention by an oil filter of the type mentioned, which is characterized in that
the screw cap and the filter cartridge are locked together to enable transmission of axial forces from both directions to the filter cartridge, wherein
the screw cap has on its inside a plurality of spring tongues with locking projections arranged on a circle and projecting into the filter interior and
the filter cartridge has at its end on the cover side a circular, matching locking recess that fits the locking projections, the spring tongues projecting to the bottom of the locking recess.

Die überraschende Wirkung der Erfindung besteht darin, daß die Bedienungsperson beim Wechsel der Filterpatrone nur den Deckel mit der daran rastend befestigten Filterpatrone mit einer Hand ergreifen muß, die Filterpatrone schräg mit dem freien Ende auf eine Unterlage abstützt und durch leichten Druck mit der Hand die Filterpatrone aus der Rasterung löst, wobei die Filterpatrone nicht angefaßt wird, und worauf die Filterpatrone abfällt.The surprising effect of the invention is that when changing the filter cartridge, the operator only has to grasp the lid with the filter cartridge fastened to it with one hand, the filter cartridge is supported diagonally with the free end on a base and the filter cartridge is pressed by hand detaches from the grid, whereby the filter cartridge is not touched, and whereupon the filter cartridge falls off.

Die Erfindung wird im folgenden anhand zweier Zeichnungen erläutert. Die Zeichnungen zeigen in

Figur 1
einen Ölfilter mit eingesetzter Filterpatrone im Längsschnitt und in
Figur 2
eine vergrößerte Darstellung des deckelseitigen Abschnitts des Ölfilters.
The invention is explained below with reference to two drawings. The drawings show in
Figure 1
an oil filter with an inserted filter cartridge in longitudinal section and in
Figure 2
an enlarged view of the cover-side portion of the oil filter.

Wie die Figur 1 zeigt, besteht der Ölfilter 1 im wesentlichen aus einem Filtergehäuse 2 mit Sockel 20, einer in das Gehäuse 2 eingesetzten, auswechselbaren Ölfilterpatrone 6 und einem das Gehäuse oberseitig abschließenden Schraubdeckel 7. Die Längsachse des Filtergehäuses 2 verläuft schräg nach oben weisend, so daß sich eine annähernd stehende Lage des Filtergehäuses 2 ergibt. Der Sockel 20 des Filtergehäuses 2 ist gegenüber der Längsachse des Gehäuses 2 abgewinkelt und endet in einer im wesentlichen vertikal verlaufenden Flanschfläche 20', die zur Verbindung des Ölfilters 1 mit einem nicht dargestellten Verbrennungsmotor eines Kraftfahrzeuges dient. Weiterhin dient der Sockel 20, wie durch Strömungspfeile angedeutet, zur Zuführung und Abführung von Öl. Verschmutztes Öl gelangt durch einen Öleinlaß 21 im hinteren, oberen Teil des Sockels 20 in einen die Filterpatrone 6 umgebenden Einlaßraum 23 und verteilt sich dort über den Umfang der Patrone 6. Nach dem Durchströmen der Filterpatrone 6, genauer deren Filterstoffkörpers 60, sammelt sich das nunmehr gereinigte Öl im Innenbereich 24 des Filters 1 und strömt von dort - entsprechend den eingezeichneten Strömungspfeilen - durch einen zentralen Ölauslaß 22 und den Sockel 20 wieder ab. Der Einlaßraum 23 und der Innenbereich 24 des Ölfilters 1 sind dabei durch einen Dichtring 62, vorzugsweise aus Gummi, am unteren Stirnende 64 der Filterpatrone 6 durch den Deckel 7 am oberen Stirnende 63 der Patrone 6 voneinander getrennt.As FIG. 1 shows, the oil filter 1 essentially consists of a filter housing 2 with a base 20, an exchangeable oil filter cartridge 6 inserted into the housing 2 and a screw cap 7 closing the housing on the top side. The longitudinal axis of the filter housing 2 runs obliquely upwards, so that there is an approximately upright position of the filter housing 2. The base 20 of the filter housing 2 is angled with respect to the longitudinal axis of the housing 2 and ends in a substantially vertically running flange surface 20 ', which serves to connect the oil filter 1 to an internal combustion engine (not shown) of a motor vehicle. Furthermore, the base 20 serves, as indicated by flow arrows, for the supply and discharge of oil. Dirty oil passes through an oil inlet 21 in the rear, upper part of the base 20 into an inlet space 23 surrounding the filter cartridge 6 and is distributed there over the circumference of the cartridge 6. After flowing through the filter cartridge 6, more precisely its filter material body 60, this now collects cleaned oil in the inner area 24 of the filter 1 and flows from there - according to the flow arrows shown - through a central oil outlet 22 and the base 20 again. The inlet space 23 and the inner region 24 of the oil filter 1 are separated from one another by a sealing ring 62, preferably made of rubber, on the lower end 64 of the filter cartridge 6 by the cover 7 on the upper end 63 of the cartridge 6.

Im unteren Teil des Sockels 20 verläuft ein Ableitungskanal 25, der dazu dient, daß in dem Gehäuse 2 des Ölfilters 1 befindliche Öl beim Austausch der Filterpatrone 6 abzuleiten. Im normalen Betrieb des Ölfilters 1, d.h. bei eingesetzter Filterpatrone 6, ist der Ableitungskanal 25 dagegen gesperrt.In the lower part of the base 20 there is a drainage channel 25, which serves that in the housing 2 of the oil filter Derive any oil present when replacing the filter cartridge 6. In contrast, in normal operation of the oil filter 1, ie when the filter cartridge 6 is inserted, the discharge channel 25 is blocked.

Mit Bezugnahme auf Figur 2 ist bei dem Ölfilter 1 die Filterpatrone 6 und der Schraubdeckel 7 lösbar miteinander verbunden. Hierzu besitzt der Schraubdeckel 7 an seiner Innenseite 70 mehrere Federzungen 71 und 71', von denen zwei sichtbar sind. Die Federzungen 71 und 71' sind auf einem zur Längsachse des Filtergehäuses 2 konzentrischen Kreis angeordnet und ragen von der Deckelinnenseite 70 in das Innere des Filtergehäuses 2. An ihrem inneren Ende besitzen die Federzungen 71 und 71' nach außen vorstehende Rastvorsprünge 72 und 72', die bei in das Gehäuse 2 eingesetzter Filterpatrone 6 in eine passende, taillierte Rastvertiefung 65 in der oberen Stirnseite 63 der Filterpatrone 6 eingreifen. Hierdurch wird erreicht, daß von dem Schraubdeckel 7 axiale Kräfte in beiden Richtungen auf die Filterpatrone 6 übertragen werden können und daß die Filterpatrone 6 durch Abkanten leicht und umweltfreundlich vom Schraubdeckel 7 gelöst werden kann. Die Verbindung des Schraubdeckels 7 mit dem Filtergehäuse 2 erfolgt bei dem hier dargestellten Ausführungsbeispiel des Ölfilters 1 unter Zwischenlage eines Dichtringes 73 durch Verschrauben.With reference to FIG. 2, the filter cartridge 6 and the screw cap 7 are detachably connected to one another in the oil filter 1. For this purpose, the screw cap 7 has a plurality of spring tongues 71 and 71 'on its inside 70, two of which are visible. The spring tongues 71 and 71 'are arranged on a circle concentric to the longitudinal axis of the filter housing 2 and project from the inside of the cover 70 into the interior of the filter housing 2. At their inner end, the spring tongues 71 and 71' have outwardly projecting latching projections 72 and 72 ', the filter cartridge 6 inserted into the housing 2 engage in a matching, waisted locking recess 65 in the upper end face 63 of the filter cartridge 6. This ensures that axial forces can be transmitted from the screw cap 7 to the filter cartridge 6 in both directions and that the filter cartridge 6 can be easily and environmentally friendly removed from the screw cap 7 by folding. The screw cap 7 is connected to the filter housing 2 in the exemplary embodiment of the oil filter 1 shown here with the interposition of a sealing ring 73 by screwing.

Claims (1)

  1. An oil filter for cleaning lubricating oil, in particular for internal combustion engines of motor vehicles, with a filter housing (2) which in the assembled state is arranged at least approximately vertically, with a screw-on cover (7), with an annular oil filter cartridge (6) inserted into said filter housing (2), furthermore with an oil inlet (21) for contaminated oil flowing around the oil filter cartridge (6) and with an oil outlet (25) for cleaned oil connected to the central inner region of the filter housing in a base (20) at the lower end of the filter housing (2),
    characterised in that the screw-on cover (7) and the filter cartridge (6) are locked together permitting transmission of axial forces to the filter cartridge (6) from both directions, in which
    the screw-on cover (7) has on its inside (70) a plurality of spring tongues (71, 71') with catch projections (72, 72') arranged in a circle and projecting into the interior of the filter (24) and the filter cartridge (6) on its cover-side end has one waisted circular catch recess to fit the catch projections (72, 72'), the spring tongues (71, 71') extending as far as the bottom of the catch recess.
EP89100858A 1987-11-04 1988-09-26 Oil filter for the purification of lubricating oil Revoked EP0319518B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8714656U 1987-11-04
DE8714656U DE8714656U1 (en) 1987-11-04 1987-11-04

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP88115792.9 Division 1988-09-26

Publications (3)

Publication Number Publication Date
EP0319518A2 EP0319518A2 (en) 1989-06-07
EP0319518A3 EP0319518A3 (en) 1990-04-04
EP0319518B1 true EP0319518B1 (en) 1993-05-12

Family

ID=6813725

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88115792A Expired - Lifetime EP0314915B2 (en) 1987-11-04 1988-09-26 Filter for the purification of lubricating oil
EP89100858A Revoked EP0319518B1 (en) 1987-11-04 1988-09-26 Oil filter for the purification of lubricating oil

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP88115792A Expired - Lifetime EP0314915B2 (en) 1987-11-04 1988-09-26 Filter for the purification of lubricating oil

Country Status (6)

Country Link
US (2) US4906365A (en)
EP (2) EP0314915B2 (en)
JP (2) JPH0611369B2 (en)
CA (1) CA1321149C (en)
DE (3) DE8714656U1 (en)
ES (1) ES2031203T5 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325997C1 (en) * 1993-08-03 1994-09-01 Hengst Walter Gmbh & Co Kg Liquid filter having a filter insert
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Also Published As

Publication number Publication date
CA1321149C (en) 1993-08-10
EP0314915B1 (en) 1992-05-06
EP0314915B2 (en) 1996-05-08
JPH0611369B2 (en) 1994-02-16
JPH022806A (en) 1990-01-08
EP0319518A3 (en) 1990-04-04
US4906365A (en) 1990-03-06
DE8714656U1 (en) 1987-12-17
EP0314915A2 (en) 1989-05-10
DE3880979D1 (en) 1993-06-17
JPH022805A (en) 1990-01-08
EP0319518A2 (en) 1989-06-07
ES2031203T5 (en) 1996-10-01
US4948503A (en) 1990-08-14
ES2031203T3 (en) 1992-12-01
JPH0679643B2 (en) 1994-10-12
DE3870808D1 (en) 1992-06-11
EP0314915A3 (en) 1989-06-28

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